Iftop is what I downloaded to see my daily internet usage of my computer or any other computer on my LAN (ie bro and sisters usage). I want total MB's/day from each computer. so I installed and ran sudo iftop and I get a screen just like the website says I should except, no domains or IP's or anything, its an empty chart. Is there a command I have to tell it to monitor my local network? I know there's activity I am surfing right now. Yes I read the webpage, no I did not glean a how to use, so it must be that "common knowledge" thing I am missing.
iftop display Network Interface Bandwidth Usage. To install iftop if not installed, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:
sudo apt-get install iftop
By default iftop command displays the bandwidth usage of the first available Ethernet device.
Or you can also specify an interface using the -i option.
sudo iftop -i eth0
While iftop is running, you can press any one of the following keys to display more output.
S - display source port D - display destination port n - show IP instead of host name 1/2/3 - sort by the specified column < - sort by source name > - sort by destination name P - pause display ( else it will be often updated to show the current status ) j/k - scroll display ? - for help
The image below shows the different arguments (options) that you can use with iftop.